Spring rope socket



Nov. 20, 1923, 1,474,701

' E. C, ARCHIBALD SPRNG ROPE SOCKET Filed April 6,4 1920 -Z/ if /fPatented Nov. 2f), 1923..

unirsi) STATES *i g l 1,414,701 'PATENT lorries.

nuenrn C. AaCHiBALn or COUNCIL BLUFrsiowA.

SPRING nor-E SOCKET.

Application aiedaprii e,

Be it known that EUGENE C. ARCHIBALD, a citizen of the United States,residingl at Council Bluffs, in the county of Pottawat-V tamie and Stateof Iowa, has invented certain new and useful Improvements in Spring RopeSockets, of which the following is a specification.

The invention relates to spring rope sockets and has for its objects toprovide a socket of this character, which is used in drillingwherebywhen the bit which is cari'ied by the socket head strikes rock or asolid surface the solid reboundy of the vertical shaft will be taken up.Also to provide spring means whereby the sudden jerk on the cable willbe taken up during the operation of the drill thereby preventing thebreaking of the cable, which is a common defect in the structures now inuse.

A further object is to provide a bit holder for the reception of a bit,which holder has threaded to its upper end a cylindrical casing in whichcasing a reciprocating shaft is disposed and normally held in engagementwith the top of the bit holder by means of coiled springs interposedbetween a 'flange of the shaft and a casing head through which the shaftextends, said shaft having secured to its upper end a cable socket forthe reception of a cable, the springs forming means whereby a suddenjerking upon the cable will cause the compression of the springs andconsequent taking up ofthe jerk upon the cable, thereby preventing 'thebreaking of the cable.

lVith the above and other objects in view the invention resides in thecombination and arrangement of parts as hereinafter set forth,'shown inthe drawings, described and claimed, it being understood that changes inthe precise embodiment of the invention may be made within the scope ofwhat is claimed without departing from the spirit of the invention.

In the drawings Figure 1 is a side elevation of the bit holder showingthe cable connection thereto. Figure 2 is a vertical sectional viewthrough the bit holder casing and cable connection, showing the springsdisposed within v the casing.

Referring to the drawings, the numeral 1 designates a bit holder and 2 abit receiving socket therein. However, the socket 2 may receive athreaded portion 3 of an extension 1920. serial No; 371,703.

4, which extension may receive the bit in the?v threaded socket 5. `Theextension is provvided with wrench ,engagingv portions 6 for thereception of a wrench when assembling. the eXtensionin connection withthe `bit holder. The ybit holder 1 is cylindrical andis provided with awrench engaging portion 7 for the reception of a wrench so that theholder may be rotated when assembling the parts.

The upper end of the bit holder 1 is prov vided with avreduced threadedcylindrical extension 8, on which extension the lower end of thecylindrical casing 9 is threaded. Threaded on the upper end of thecasing 9 is a casing head 10, which head is provided with a centrallydisposed bore 11 in which is vertically slidable a shaft 12. The lowerend of the shaft'is provided with a head 13 which is normally maintainedin engagement with the threaded extension 8-`of the bit holder 1 bymeans of coiled springs 14,

which are interposed between the head 12sand the bottom surface 15 ofthe casing head 10. t Springs 14: have interposed 4between theiradjacent ends, washers 16 which maintain the springs spaced, and at thesame time its threaded end 18 is screwed into the cable headv 19, towhich cable head the cableis secured by soldering the cable end in the.

socket 21.

The operation is as follows: When a .sudden pull is imparted to thecable 20 in Vthe direction ofthe arrow a, the shaft 12 v will moveupwardly in the bore 11, thereby causing the head 13 to move upwardly inthe casing 9, thereby compressing the springs 14, which springs willtake up theV sudden jerk and prevent the snapping of the cable 20. -Thesprings being of sufficient strength to cause the casing 9 andy bitholder 1 to immediately move upwardly afterthe initial jerk until theheadv 13 ofthe shaft 12 is again in engagement with the threaded eX-tension 8, so that as the cable 20 is again moved downwardly the bitholder 1 and the bit carried thereby will upon impact have the fullforceY or Weight of the, device as a AWhole and the springs 14: will beout of operation,w

From the above it will be seen that a bit holder and cable socket isprovided wherein the cable 2O Will be obviated and one Wherein theaction of the parts is positive, and eheient.

The inventionhaving been set forth What is claimed as ne7 and usefulisz- A bit holder and cable connection therefor comprising a easingcarried by the upper end of thelei'tholder, aV head carried by the upperendy of the` casi-ng,v a shaft slid-able in upper end of the shaft abovethe easing headV being provided With a` reduced Wrench engaging portion,said shaft above the Wrench engaging portion being enlarged and threadedand a cable socket threaded on the threaded portion of the shaft andspaced from the upper end of the easing head.

In testimony whereof I affix signature. Y

.EUGENE C. ARCHBALD.

